Toshiba BMS-IFMB1280U-E Installation guide

BMS-IFMB1280U-E
Toshiba
Brand
Toshiba
Model
BMS-IFMB1280U-E
Category
Split-system air conditioners
Type
Installation guide

The Toshiba BMS-IFMB1280U-E Modbus interface enables connection of air conditioners with TU2C-LINK Uh Line (Uh Line) installed and TCB-IFCG1TLE to a Modbus system. By converting signals between Uh Line and Modbus Master, it facilitates communication and control of the connected devices within a Modbus network, allowing for efficient monitoring and management of air conditioning systems in commercial buildings.

The Toshiba BMS-IFMB1280U-E Modbus interface enables connection of air conditioners with TU2C-LINK Uh Line (Uh Line) installed and TCB-IFCG1TLE to a Modbus system. By converting signals between Uh Line and Modbus Master, it facilitates communication and control of the connected devices within a Modbus network, allowing for efficient monitoring and management of air conditioning systems in commercial buildings.

Central Control Device
Installation Manual
Modbus interface
Model name:
BMS-IFMB1280U-E
BMS-IFMB1280U-TR
For commercial use
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Modbus interface Installation Manual
Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 Before installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5 Connection of power cables / earth wires / communication cables . . . . . . . . . . . . . 5
6 Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Test run check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
• Thank you very much for purchasing this TOSHIBA Modbus interface.
• Please read this manual carefully beforehand for proper installation of the Modbus interface.
“AEEE Yönetmeligine Uygundur.”
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Modbus interface Installation Manual
1Precautions for safety
• Read these “Precautions for Safety” carefully before installation.
• The precautions described below include important items regarding safety. Observe them without fail.
Understand the following details (indications and symbols) before reading the body text, and follow the
instructions.
• After the installation work has been completed, perform a test run to check for any problems. Explain how to use
and maintain the unit to the customer.
• Ask customer to keep this Manual at accessible place for future reference.
Indication Meaning of Indication
Text set off in this manner indicates that failure to adhere to the directions in the warning could result in
serious bodily harm (*1) or loss of life if the product is handled improperly.
Text set off in this manner indicates that failure to adhere to the directions in the caution could result in
serious bodily injury (*2) or damage (*3) to property if the product is handled improperly.
*1: Serious bodily harm indicates loss of eyesight, injury, burns, electric shock, bone fracture, poisoning, and other
injuries which leave aftereffect and require hospitalization or long-term treatment as an outpatient.
*2: Bodily injury indicates injury, burns, electric shock, and other injuries which do not require hospitalization or long-
term treatment as an outpatient.
*3: Damage to property indicates damage extending to buildings, household effects, domestic livestock, and pets.
Symbols Meaning of Symbols
“ ” Indicates prohibited items.
The actual contents of the prohibition are indicated by a picture or text placed inside or next to the graphic
symbol.
“ ” Indicates compulsory (mandatory) items.
The actual contents of the obligation indicated by a picture or text placed inside or next to the graphic
symbol.
•Ask an authorized dealer or qualified installation professional to install or reinstall this unit.
Inappropriate installation may result in electric shock or fire.
•Electrical work must be performed by a qualified electrician in accordance with this installation
manual.
The work must satisfy all local, national and international regulations.
Inappropriate work may result in electric shock or fire.
•Be sure to turn off all main power supply switches before starting any electrical work.
Failure to do so may result in electric shock.
• Do not modify the unit.
A fire or an electric shock may occur.
•Do not install this unit where flammable gas may leak.
If gas leaks and accumulates around the unit, it may cause a fire.
•Perform wiring correctly in accordance with specified the current capacity.
Failure to do so may result in short-circuiting, overheating or fire.
•Use predefined cable and connect them certainly. Keep the connecting terminal free from
external force.
It may cause an exothermic or a fire.
WARNING
CAUTION
WARNING
CAUTION
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Modbus interface Installation Manual
2Introduction
Applications / Functions / Specifications
Applications
• The Modbus interface is used to connect air conditioners “with TU2C-LINK Uh Line (hereinafter, referred to as
Uh Line) installed” and TCB-IFCG1TLE to Modbus* system.
Functions
• The Modbus interface converts signals between Uh Line and Modbus Master.
Specifications
* Note) “Modbus” is a registered trade mark of Schneider Electric SA.
External view
Power supply 220 - 240 VAC, 50/60 Hz
Power consumption 3 W
Operating temperature / humidity 0 to 40 °C, 10 to 90 % RH (no condensation)
Storage temperature -20 to +60 °C
Chassis material Galvanized sheet metal 0.8 t (no coating)
Dimensions 66 (H) x 170 (W) x 200 (D) mm
Mass 1.1 kg
146.9
170
156
787822 22
200
7822 78 22 63.6
66
6-Ø5.5 mounting
holes
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Modbus interface Installation Manual
3Before installation
Check the following package contents.
Use the following wiring materials to connect the communication cables and power cables. (locally procured)
4Installation
Modbus interface installation method and orientation
There are five installation methods for this Modbus interface as shown below: surface mount and wall mounts. Use
the attached screws.
REQUIREMENTREQUIREMENT
Do not install the unit in any of the following places.
• Humid or wet place
• Dusty place
• Place exposed to direct sunlight
• Place where there is a TV set or radio within one meter
• Place exposed to rain (outdoors, under eaves, etc.)
Installation space and maintenance space
A side space for connecting through cable inlets and an upper space for maintenance
must be reserved before installation.
The other sides can be adjacent to surrounding objects.
No. Item Quantity Remarks
1 Modbus interface 1
2 Installation Manual 1
3 Screw 4 M4 x 12 mm tapping screws
4 Cable clamp 1
No. Line Description
1 For Uh Line
Type
Refer to "Design of Control Wiring"(P.7 to P.11).Wire size
Length
2 For RS-485
Type 2-core shielded wires
Wire size 1.25 mm2, 500 m max.
(total length)
Length
3 For power Type H07 RN-F or 245IEC66
0.75 mm2, 50 m max.
Wire size
No good
100 mm
100 mm
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Modbus interface Installation Manual
5Connection of power cables / earth wires /
communication cables
CAUTION
• The RS-485 communication cables have polarity. Connect A(+) to A(+), and B(-) to B(-). If connected with incorrect
polarity, the unit will not work.
• The Uh Line communication cable have no polarity.
Connect power cables, earth wires, and communications cables to the specified terminals on the terminal block.
50 1010 35 10
L
N
55 10
50 10
A(+)
B(-)
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Modbus interface Installation Manual
Termination resistance setting
• TU2C-LINK / TCC-LINK termination resistance setting ............<For TCC-LINK>
Leave just 1 line of the termination resistance in the
interface board of the outdoor unit (centre unit) ON, and
turn all the others OFF. (Refer to the wiring diagram
attached to the outdoor unit for the position of SW.)
<For TU2C-LINK>
For the central control wiring (Uh line), set the termination
resistance that is farthest away on the wiring between this
central controller and the other unit (VRF light commercial,
air to air heat exchanger, general purpose control
interface, air to water heat pump) to ON.
Refer to the manual of each model for the termination resistance setting method.
Shield grounding process
• Central control wiring shielded wire ...........................................When using the central remote controller with one unit,
open the shielded wire of the central control wiring and
perform insulation processing.
When using the central remote controller with multiple
units, connect the shield of the central control wiring to the
closed end and open the shield at the final end of the
central remote controller to perform insulation processing.
Perform the central control wiring shield grounding on the
air conditioner side.
REQUIREMENTREQUIREMENT
• Be sure to install a circuit breaker or all-pole isolating switch (with a contact breaking distance of at least 3 mm) on the
primary side of the power supply.
• Fasten the screws to the terminal block with torque of 0.5 N•m.
U3 U4
LINK (Uh)
U3 U4
LINK (Uh)
U3 U4
LINK (Uh)
U3 U4
LINK (Uh)
Termination resistance
ON
Termination resistance
OFF
Termination resistance
ON
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Modbus interface Installation Manual
Design of Control Wiring
Communication method and model name
The TU2C-LINK model (U series) can be used together with previous models (other than U series).
For details of the model and communication method, see the following table.
Communication method TU2C-LINK (U series) TCC-LINK (other than U series)
Outdoor unit Other than on the left
(MMY-MAP***, MCY-MAP***, etc.)
Indoor unit Other than on the left
(MM*-AP***, etc.)
Wired remote controller Other than on the left
Wireless remote controller
receiver Other than on the left
Central control device Other than on the left
MMY-M P***
U series model
MM*- P***
U series model
RBC-AMS **
U series model
RBC-AXR **
U series model
TCB-AXR **
U series model
***-*** **
U series model
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Modbus interface Installation Manual
When the connected outdoor unit is Super Multi u series (U series)
Follow the wiring specifications in the table below even when there is a mix of U series and non-U series in the connected indoor
units or remote controllers.
Wiring specifications
REQUIREMENTREQUIREMENT
When wiring the control wiring between indoor and outdoor units (Uv line)/control wiring between outdoor units (Uc line) and
the central control wiring (Uh line), use the same wire type and diameter for each line.
Using a mixture of different wire types and diameters may cause a communication error.
System diagram
* The wiring specifications in the system diagram above are the same even when the indoor unit or remote controller are other
than the U series.
Item Communication line
Central control wiring (Uh line)
Wire diameter 1.0 to 1.5 mm2 (up to 1000 m)
2.0 mm2 (up to 2000 m)
Wire type 2-core, non-polar
Wire types that can be used Shielded wire
U3 U4
LINK (Uh)
U6
U4
U1 U2
Uv
AB
U6
U4
U1 U2
Uv
AB
U6
U4
U1 U2
Uv
AB
U6
U4
U1 U2
Uv
AB
U2
Uv
U5 U6
Uc
U3 U4
Uh
U1 U2
Uv
U5 U6
Uc
U3 U4
Uh
U1 U2
Uv
U5 U6
Uc
U3 U4
Uh
U1
Central control
device
<U series>
Outdoor unit
(Super Multi
u series)
<U series>
Indoor unit *
<U series>
Remote
controller *
[Central control wiring (Uh line)]
L1 = Up to 2000 m
[Control wiring between indoor and outdoor units (Uv
line)/Control wiring between outdoor units (Uc line)]
L2 = Up to 1000 m
(L3+L4) = Up to 1000 m
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Modbus interface Installation Manual
When the connected outdoor units are other than Super Multi u series (U series)
Wiring specifications
REQUIREMENTREQUIREMENT
When wiring the control wiring between indoor and outdoor units/central control wiring and the control wiring between outdoor
units, use the same wire type and diameter for each line.
Using a mixture of different wire types and diameters may cause a communication error.
System diagram
* The wiring specifications in the system diagram above are the same even when the indoor unit or remote controller are other
than the U series.
Item
Communication line
Control wiring between indoor and outdoor units and central control
wiring
Wire diameter 1.25 mm2 (up to 1000 m)
2.0 mm2 (up to 2000 m)
Wire type 2-core, non-polar
Wire types that can be used Shielded wire
U2
U4
U3 U4
U3 U4
U6
U4
U1
Uv Uv Uv Uv
U2
A
B
U6
U4
U1 U2
AB
U6
U4
U1 U2
AB
U6
U4
U1 U2
AB
U1
U3
U2
U5 U6
U3 U4
U1 U2
U5 U6
U3 U4
U1
U2 U5 U6
U3 U4
U1
LINK (Uh)
Central control
device
<Other than U
series>
Outdoor unit
(Super Module
Multi i series
• Super Multi mini)
<U series>
Indoor unit *
<U series>
Remote
controller *
[Central control wiring/Control wiring between indoor
and outdoor units]
(L1+L2+L3) = Up to 2000 m
[Control wiring between indoor and outdoor units]
L4 = Up to 100 m
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Modbus interface Installation Manual
When connecting to a previous model light commercial, air to air heat exchanger, air to water
heat pump, or general purpose equipment control interface
Follow the wiring specifications in the table below even when there is a mix of U series and non-U series in the connected indoor
units or remote controllers.
Wiring specifications
REQUIREMENTREQUIREMENT
When wiring the control wiring between indoor and outdoor units (Uv line)/control wiring between outdoor units (Uc line) and the
central control wiring (Uh line), use the same wire type and diameter for each line.
Using a mixture of different wire types and diameters may cause a communication error.
System diagram
* The wiring specifications in the system diagram above are the same even when the indoor unit or remote controller are other
than the U series.
Item Communication line
Central control wiring (Uh line)
Wire diameter 1.25 mm2 (up to 1000 m)
2.0 mm2 (up to 2000 m)
Wire type 2-core, non-polar
Wire types that can be used Shielded wire
U2
U4
U3 U4
U3 U4
U6
U4
U1
Uv
U2
A
B
U2
U5 U6
U3 U4
U1
U3 U4 U3 U4
LINK (Uh)
U6
U4 U4
A
BU6
4
Uh
A
B
Central control
device
Outdoor unit
and Other
Indoor unit *
Hydro unit
<U series>
Remote
controller *
[Central control wiring (Uh line)]
L1 = Up to 2000 m
[Control wiring between indoor and outdoor units
(Uv line)/Control wiring between outdoor units (Uc line)]
L2 = Up to 1000 m
Light Commercial
Air to air heat
exchanger
General purpose
equipment
control
interface
Air to Water
Heat Pump
TCC-LINK
adapter
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Modbus interface Installation Manual
REQUIREMENTREQUIREMENT
Disconnect the appliance from the main power supply.
This appliance must be connected to the main power supply by a circuit breaker or switch with a contact separation of at least
3 mm.
Fasten the screws to the terminal with torque of 0.5 Nm.
Wiring connection
The following describes a connection example when two or more Modbus interface units are used.
Termination resistance setting (See “6 Setting” for the setting method.)
• Set the RS-485 termination resistance to “120 ohm” for address1 (Modbus interface address SW1=1) Modbus
interface unit, and set to “open” for other units.
• Set the Uh Line Termination resistance.
Refer to "Termination resistance setting"(P.6)
Shield earthing
• The shielded wire of the RS-485 communication cable must be earthed on address 1 (Modbus interface address
SW=1) Modbus interface. Fix the shielded wire of RS-485 communication cable with metal cable clamp and
screw it to the chassis to earth it. The shielded wires must be crimped with closed end connectors on interfaces
with address of other than 1. The shielded wire ends must be insulated and left open.
• Do not connect the shield wire to the terminal block. It should be open and insulated. The shielded wire of the
Uh Line communication cable must be earthed on the air conditioner.
LINK(Uh)
U3 U4 FG
RS-485
L N
SW1
SW4
LED1
LED2
LED3
LED4
LED5
SW2
SW7SW6SW5
SW3
1234
SG A(+) B(-)
SW8
12
Air conditioner
Modbus Master
Power supply
220V-240 VAC
(50/60 Hz)
The shielded wire of the RS-485
communication cable must be earthed on
address 1 (Modbus interface address SW=1)
Modbus interface. The shielded wires must
be crimped with closed end connectors on
interfaces with address of other than 1. The
shielded wire ends must be insulated and left
open.
The shielded wire of the Uh
Line communication cable
must be earthed on the air
conditioner. Do not connect
the shield wire to the
terminal block. It should be
open and insulated.
Connect the earth wire to the
earth terminal on the chassis.
Connect the power supply cable
and earth wire to the terminals
using ring terminals with insulation
sleeve.
To connect 2 cables,
change the preset cable
clamp to the provided one
and fix the cables with the
cable clamp as shown in
the figure left.
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Modbus interface Installation Manual
LINK(Uh)
U2 U1
U4 U3
U2 U1
U4 U3 U4 U3
4
A
BSG
U4
U3FG
RS-485
SW6SW5
SW1
U2 U1 U2 U1 U2 U1
U2 U1
U4 U3
U2 U1
U4 U3 U4 U3
U2 U1 U2 U1 U2 U1
L
N
LINK(Uh)
1
A
BSG
U4
U3FG
RS-485
SW6SW5
SW1
L
N
A
(+) (-)
B
Indoor unit
Do not connect the shielded wire of
Uh Line communication cable to the
earth.
Power supply
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Remote
controller
Remote
controller
Remote
controller
Remote
controller
Power
supply
Central remote
controller
Central remote
controller
LINK(Uh) U3 and
U4 have no polarity.
Set the RS-485 termination resistance on
the address1 unit (Modbus interface
address SW1=1) and host system. Do not
set it here.
Uh Line termination resistance
Refer to "Termination resistance
setting"(P.6)
The shielded wire of the RS-485
communication cable must be earthed
on address 1
CAUTION: RS-485 communication
cables A(+) and B(-) have polarity.
Be careful when connecting the RS-
485 wires.
RS-485 termination resistance is set
by Modbus interface of address
setting switch SW1=1 only.
Set the Modbus interface address with SW1. Assign 1 to
F(15) to each address to avoid duplication.
CAUTION: The SW1 setting is read when the power is
turned on. Push the reset switch SW7 after changing the
address.
Modbus-Master
(Locally procured)
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Modbus interface Installation Manual
6Setting
The following settings are necessary to use Modbus interface.
• SW1 Sets the Modbus slave addresses of the Modbus interface.
A single Modbus interface uses three Modbus slave addresses.
(One address for the current interface and two addresses for potential interfaces.)
When two or more Modbus interfaces are used for a single line RS-485 bus, set the addresses as
indicated in the table below.
Assign address numbers in ascending order, from smallest to largest.
CAUTION
•
For the Modbus interface whose address SW1=1, perform termination resistance setting.
•
When the SW1 setting has been changed, press the reset switch SW7. The new address setting is read.
•
When the setting of bit3 and bit4 of SW3 has been changed, press the reset switch SW7. The new set value is read.
Modbus interface Address
No.1 1
No.2 4
No.3 7
No.4 10
No.5 13
• SW2 Test switch Not used during operation. Set these switches to zero (0) or “all OFF”.
• SW3 Test switch Bit1: Central controller ID setting mode switch
Bit2: Switches the LED5 display for test runs.
Bit3, 4: RS-485 baud rate setting (9600/19200/38400) bps.
• SW4 Test switch Not used during operation.
• SW5 RS-485 termination resistance select switch
Set “120 ohm” only when the Modbus interface address SW=1, and set “open” for other Modbus interfaces.
• SW6 Uh Line termination resistance select switch
Refer to "Termination resistance setting"(P.6)
• SW7 Reset switch
When performing an address setting with SW1, push this reset switch after the address setting to read
the set value.
• SW8 Test switch (Not used during operation. All OFF usually)
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Modbus interface Installation Manual
U3 U4 FG ABSG L N
LINK(Uh) RS-485
SW1
SW4
LED1
LED2
LED3
LED4
LED5
SW2
SW7SW6SW5
SW3
1234
SW8
12
REQUIREMENTREQUIREMENT
•RS-485 termination resistance select switch SW5.
Set “120 ohm” only when the Modbus interface address SW=1, and set “open” for other Modbus interfaces.
•The Uh Line termination resistance is set on the air conditioner side. Set SW6 to “open”.
SW1 Modbus interface address set switch
1-F Modbus interface address
0 Not used
SW2 Test switch (0 usually)
SW3
Bit1: Uh Line communication setting mode switch.
OFF: Normal circumstance; ON: Central controller ID setting mode
Bit2: Switches the LED5 display for test runs.
OFF RS-485 communication status indicator.
ON Uh Line communication status indicator.
Bit3, 4: RS-485 baud rate setting (9600/19200/38400) bps.
3 OFF, 4 OFF 9600 bps, 3 ON, 4 OFF 19200 bps,
3 OFF, 4 ON 38400 bps, 3 ON, 4 ON 19200 bps.
SW4 Test switch
SW5 RS-485 termination resistance
select switch 120 ohm Open
SW6 Uh Line termination resistance
select switch 100 ohm Open
SW7 Reset switch
SW8 Test switch (all OFF usually)
LED1 Power indicator
LED2 RS-485 communication status indicator
LED3 Uh Line communication status indicator
LED4 Uh Line communication error indicator
LED5 Test indicator
ON
ON
ON
ON
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Modbus interface Installation Manual
Central controller ID setting mode
The central controller ID setting mode changes the central controller ID of the Modbus interface. (central controller
ID at the time of factory shipping is central controller ID 20.)
The central controller ID number indicates the Uh Line address and communication priority for the Uh Line
compatible central control device.
Change the central controller ID in the following cases.
• If using Modbus interface with a central control device not compatible with Uh Line, set the central controller ID
as “old controller.”
(1) Transition to central controller ID setting mode
• If setting the Modbus slave address with SW1, make a note of the SW1 value before performing central
controller ID setting operations.
• Turn on bit1 of SW3.
(2) Verification of central controller ID
• If SW1 is set to 0, central controller ID is displayed by LED2 to LED5.
=ON, =OFF
Central controller ID LED5 LED4 LED3 LED2
Central controller ID7
Central controller ID8
Central controller ID9
Central controller ID10
Central controller ID11
Central controller ID12
Central controller ID13
Central controller ID14
Central controller ID15
Central controller ID16
Central controller ID17
Central controller ID18
Central controller ID19
Central controller ID20 (initial value)
Old controller
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Modbus interface Installation Manual
(3) Change of central controller ID
• Change SW1 to 1-F and press SW4.
• If using Modbus interface with a central control device not compatible with Uh Line, set as “old controller.”
NOTE
Because the Uh Line compatible central control device uses high-order central controller ID, setting of central
controller ID1 to ID6 cannot be done with Modbus interface.
(4) Conclusion of central controller ID setting mode
• Turn off bit1 of SW3.
• Return the SW1 value to that of the Modbus slave address.
IMPORTANT
Immediately after the power is turned on for the Modbus interface, the SW1 value is the Modbus slave address.
When the power is turned on, if the SW1 value is that of the central controller ID or is 0, the Modbus interface
will not operate properly.
When concluding the central controller ID setting mode, be sure to return the SW1 value to that of the Modbus
slave address.
Central controller ID SW1
Central controller ID7 1
Central controller ID8 2
Central controller ID9 3
Central controller ID10 4
Central controller ID11 5
Central controller ID12 6
Central controller ID13 7
Central controller ID14 8
Central controller ID15 9
Central controller ID16 A
Central controller ID17 B
Central controller ID18 C
Central controller ID19 D
Central controller ID20 (initial value) E
Old controller F
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Modbus interface Installation Manual
7Test run check
Before starting test run
• Set the indoor unit central control address so that it does not match any other indoor unit addresses.
• Be sure to press the reset switch SW7 on the Modbus interface when the indoor unit central control address
setting has been changed or added.
Test run
(1) Check the communication status between Modbus interface and indoor unit or TCB-IFCG1TLE with LED5.
Check that the communication between Modbus interface and each indoor unit or TCB-IFCG1TLE connected
is normally performed by selecting an indoor unit or TCB-IFCG1TLE using SW1 to SW3.
Confirming procedure:
• Set bit2 of SW3 to “ON” during normal operation.
• Set the central control address of the target indoor unit with SW1 and SW2. Set SW1 and SW2 according to
the “Indoor unit central control address and SW1/SW2 setting” table below.
• Communication status is displayed by LED5.
• The protocol for communication with an indoor unit is displayed by LED4.
Indoor unit or TCB-IFCG1TLE central control address and SW1/SW2 setting
Communication status with indoor unit LED5 Remarks
Normal Lighting
Error Blinking Communication with the indoor unit was established
previously, but is disabled currently.
Invalid indoor unit Light off Communication with the indoor unit has never been
established.
Protocol for communication with
indoor unit LED4 Note
In communication via Uh Line On When Modbus interface is performing communication with
the relevant indoor unit via Uh Line.
In communication based on old
communication protocol Blinking
When Modbus interface is performing communication with
the relevant indoor unit based on old communication
protocol.
(Example) Check the communication status of indoor unit with a central control address of 41.
Set bit2 of SW3 to “ON”, SW2 to “2” and SW1 to “8”.
Indoor unit
central control
address
SW2 SW1
Indoor unit
central control
address
SW2 SW1
Indoor unit
central control
address
SW2 SW1
Indoor unit
central control
address
SW2 SW1
1 00171033204930
2 01181134215031
3 02191235225132
4 03201336235233
5 04211437245334
6 05221538255435
7 06231639265536
8 07241740275637
9 08251841285738
10 09 26 19 42 29 58 39
11 0 A 27 1 A 43 2 A 59 3 A
12 0 B 28 1 B 44 2 B 60 3 B
17-EN
Modbus interface Installation Manual
(2) Check the communication status between Modbus Interface and outdoor unit with LED5.
Check that the communication between Modbus Interface and each outdoor unit
connected is normally performed by selecting an outdoor unit using SW1 to SW3.
Confirming procedure:
• Set bit2 of SW3 to “ON” during normal operation.
• Set the line address of the target outdoor unit with SW1 and SW2.
Set SW1 and SW2 according to the table below, titled “Line address of outdoor unit and SW1/SW2 setting”.
• Communication status is displayed by LED5.
• The protocol for communication with an outdoor unit is displayed by LED4.
13 0 C 29 1 C 45 2 C 61 3 C
14 0 D 30 1 D 46 2 D 62 3 D
15 0 E 31 1 E 47 2 E 63 3 E
16 0F 32 1F 48 2F 64 3F
65 4 0 81 5 0 97 6 0 113 7 0
66 4 1 82 5 1 98 6 1 114 7 1
67 4 2 83 5 2 99 6 2 115 7 2
68 4 3 84 5 3 100 6 3 116 7 3
69 4 4 85 5 4 101 6 4 117 7 4
70 4 5 86 5 5 102 6 5 118 7 5
71 4 6 87 5 6 103 6 6 119 7 6
72 4 7 88 5 7 104 6 7 120 7 7
73 4 8 89 5 8 105 6 8 121 7 8
74 4 9 90 5 9 106 6 9 122 7 9
75 4 A 91 5 A 107 6 A 123 7 A
76 4 B 92 5 B 108 6 B 124 7 B
77 4 C 93 5 C 109 6 C 125 7 C
78 4 D 94 5 D 110 6 D 126 7 D
79 4 E 95 5 E 111 6 E 127 7 E
80 4 F 96 5 F 112 6 F 128 7 F
Communication status with outdoor unit LED5 Remarks
Normal Lighting Modbus interface is in communication with the outdoor unit.
Error Blinking Communication with the outdoor unit was established
previously, but is disabled currently.
Invalid outdoor unit Light off Communication with the outdoor unit has never been
established.
Protocol for communication with
outdoor unit LED4 Note
In communication via Uh Line On When Modbus interface is performing communication with
the relevant outdoor unit via Uh Line.
In communication based on old
communication protocol Blinking
When Modbus interface is performing communication with
the relevant outdoor unit based on old communication
protocol.
(Example) Check the communication status of outdoor unit with line address of 10.
Set bit1 of SW3 to “ON”, SW2 to “8” and SW1 to “9”.
Indoor unit
central control
address
SW2 SW1
Indoor unit
central control
address
SW2 SW1
Indoor unit
central control
address
SW2 SW1
Indoor unit
central control
address
SW2 SW1
18-EN
Modbus interface Installation Manual
Line address of outdoor unit and SW1/SW2 setting
NOTE
For air conditioner (multi type), the line addresses of outdoor unit 29 to 32 are not used.
(3) Perform the communication status checking between Modbus interface and Modbus Master.
Check that the communication with Modbus Master is normally performed.
When bit2 of SW3 is set to “OFF”, the communication status with the Modbus Master is displayed by LED5.
LED indication during normal operation
Line address of outdoor unit SW2 SW1 Line address of outdoor unit SW2 SW1
1801790
2811891
3821992
4832093
5842194
6852295
7862396
8872497
9882598
10 8 9 26 9 9
11 8 A 27 9 A
12 8 B 28 9 B
13 8 C 29 9 C
14 8 D 30 9 D
15 8 E 31 9 E
16 8 F 32 9 F
Communication status with Modbus Master LED5 Remarks
Normal reception Lighting Lights for one second
Error Light off A communication error occurred or no data has been
received.
LED Description
LED1 Power indicator Lights while the power is on.
LED2 RS-485 communication status indicator Blinks during RS-485 communication.
LED3 Uh Line communication status indicator Blinks during Uh Line communication.
LED4 Uh Line communication error indicator Lights temporarily when Uh Line is busy.
LED5 TEST indicator Used in the test mode.
19-EN
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Toshiba BMS-IFMB1280U-E Installation guide

BMS-IFMB1280U-E
Toshiba
Brand
Toshiba
Model
BMS-IFMB1280U-E
Category
Split-system air conditioners
Type
Installation guide

The Toshiba BMS-IFMB1280U-E Modbus interface enables connection of air conditioners with TU2C-LINK Uh Line (Uh Line) installed and TCB-IFCG1TLE to a Modbus system. By converting signals between Uh Line and Modbus Master, it facilitates communication and control of the connected devices within a Modbus network, allowing for efficient monitoring and management of air conditioning systems in commercial buildings.

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